Only advance focus to first notification if notification bar is visible

If notification bar isn't visible the focus is already on the first
notification.

Change-Id: Ibc707d40687b601598258b8f318321520f16eeaa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974706Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726514}

ash/system/message_center/unified_message_center_bubble.cc

@@ -179,7 +179,9 @@ bool UnifiedMessageCenterBubble::FocusOut(bool reverse) {
 }
 
 void UnifiedMessageCenterBubble::FocusFirstNotification() {
-  message_center_view_->GetFocusManager()->AdvanceFocus(false /*reverse*/);
+  // Move focus to first notification from notification bar if it is visible.
+  if (message_center_view_->IsNotificationBarVisible())
+    message_center_view_->GetFocusManager()->AdvanceFocus(false /*reverse*/);
 }
 
 bool UnifiedMessageCenterBubble::IsMessageCenterVisible() {

ash/system/message_center/unified_message_center_view.cc

@@ -157,6 +157,10 @@ void UnifiedMessageCenterView::ExpandMessageCenter() {
   message_center_bubble_->ExpandMessageCenter();
 }
 
+bool UnifiedMessageCenterView::IsNotificationBarVisible() {
+  return notification_bar_->GetVisible();
+}
+
 void UnifiedMessageCenterView::OnNotificationSlidOut() {
   if (notification_bar_->GetVisible() &&
       message_list_view_->GetTotalNotificationCount() <= 1) {

ash/system/message_center/unified_message_center_view.h

@@ -111,6 +111,9 @@ class ASH_EXPORT UnifiedMessageCenterView
   // Called when user clicks the see all notifications button.
   void ExpandMessageCenter();
 
+  // Returns true if the notification bar is visible.
+  bool IsNotificationBarVisible();
+
   // views::View:
   void AddedToWidget() override;
   void RemovedFromWidget() override;